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2012 cbf600sa sprocket change? [message #300698] Mon, 13 May 2019 03:03 Go to next message
cbf600sa is currently offline  cbf600sa   Canada
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Registered: May 2019
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(1) Club Racer
hi guys,

I have a 2012 cbf600sa and want to change the rear sprocket to achieve better highway RPMs. I believe the stock setup is 16/42. I was thinking of going to a 39 on the rear. any input would be much appreciated.


Thank you.
Re: 2012 cbf600sa sprocket change? [message #300699 is a reply to message #300698] Mon, 13 May 2019 08:03 Go to previous messageGo to next message
Kakugo is currently offline  Kakugo   Italy
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(18) Geoff Duke
Hi and welcome.

Generally speaking the best way to lower gearing is to go for one less tooth at the front and one more tooth at the rear.
That way you will be able to keep your OE chain without messing around with the wheelbase and if you aren't happy you can always go back to original. Wink

Don't worry, you won't be wheeling all over the place as the bike is very high-geared from the factory for its torque curve, but you may want to invest in a Speedo Healer or similar device to keep the lawman at bay.
Re: 2012 cbf600sa sprocket change? [message #300703 is a reply to message #300699] Mon, 13 May 2019 17:03 Go to previous messageGo to next message
cbf600sa is currently offline  cbf600sa   Canada
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Registered: May 2019
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(1) Club Racer
Hi Kakugo ,

I actually want to make the bike have higher gearing for better highway cruising, thus leaving the front and going to a 39 on the rear...
Re: 2012 cbf600sa sprocket change? [message #300708 is a reply to message #300698] Mon, 13 May 2019 20:49 Go to previous message
Kakugo is currently offline  Kakugo   Italy
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Registered: August 2003
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(18) Geoff Duke
If you want to lengthen your gearing, that's something best put off until next chain change.

To keep the original wheelbase (Honda's do not react well to wheelbase alterations, don't ask how I know) you would need to take one chain link off for every two extra teeth at the rear sprocket. You can do that on your existing chain but it's basically the same work as a chain replacement so why bother right now? Wink

And forgive my confusion, but you are the first person I hear of that actually wants to go for higher gearing on a Honda.
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